senlin engine will be blocked when action chain is too long

[Ethan Lynn]

If delete a cluster with 999 nodes, then other resize operation will be blocked.

➜ profiles git:(delete_stack) ✗ senlin cluster-resize c2 -c 20
ERROR(500): Timed out waiting for a reply to message ID 93d0b2d5b5b8479a97064499c137e7b3

https://github.com/openstack/senlin/blob/master/senlin/engine/actions/cluster_action.py#L76

    def _wait_for_dependents(self):
        """Wait for dependent actions to complete.
        :returns: A tuple containing the result and the corresponding reason.
        """
        status = self.get_status()
        reason = ''
        while status != self.READY:
            if status == self.FAILED:
                ...

[Ethan Lynn (ethanlynn)]

I think it's something related to performance, multi workers might help to avoid this problem.

[Launchpad Janitor (janitor)]

[Expired for senlin because there has been no activity for 60 days.]